feat: duplicate groups

apps/client/src/common/api/rundown.ts

@@ -87,6 +87,13 @@ export async function requestApplyDelay(delayId: EntryId): Promise<AxiosResponse
   return axios.patch(`${rundownPath}/applydelay/${delayId}`);
 }
 
+/**
+ * HTTP request for cloning an entry
+ */
+export async function postCloneEntry(entryId: EntryId): Promise<AxiosResponse<Rundown>> {
+  return axios.post(`${rundownPath}/clone/${entryId}`);
+}
+
 /**
  * HTTP request for dissolving of a block
  */

apps/client/src/common/hooks/useEntryAction.ts

@@ -20,6 +20,7 @@ import {
   deleteEntries,
   patchReorderEntry,
   postAddEntry,
+  postCloneEntry,
   putBatchEditEvents,
   putEditEntry,
   ReorderEntry,
@@ -164,6 +165,29 @@ export const useEntryActions = () => {
     ],
   );
 
+  /**
+   * Calls mutation to clone a selection
+   * @private
+   */
+  const _cloneMutation = useMutation({
+    mutationFn: postCloneEntry,
+    onSettled: () => queryClient.invalidateQueries({ queryKey: RUNDOWN }),
+  });
+
+  /**
+   * Clone a selection
+   */
+  const clone = useCallback(
+    async (entryId: EntryId) => {
+      try {
+        await _cloneMutation.mutateAsync(entryId);
+      } catch (error) {
+        logAxiosError('Error cloning entry', error);
+      }
+    },
+    [_cloneMutation],
+  );
+
   /**
    * Calls mutation to update existing entry
    * @private
@@ -735,6 +759,7 @@ export const useEntryActions = () => {
     addEntry,
     applyDelay,
     batchUpdateEvents,
+    clone,
     deleteEntry,
     deleteAllEntries,
     dissolveBlock,

apps/client/src/common/utils/__tests__/clone.test.ts

@@ -1,6 +1,6 @@
 import { EndAction, EntryCustomFields, OntimeEvent, SupportedEntry, TimerType, TimeStrategy } from 'ontime-types';
 
-import { cloneEvent } from '../eventsManager';
+import { cloneEvent } from '../clone';
 
 describe('cloneEvent()', () => {
   it('creates a stem from a given event', () => {

apps/client/src/features/rundown/Rundown.tsx

@@ -37,7 +37,7 @@ import useFollowComponent from '../../common/hooks/useFollowComponent';
 import { useRundownEditor } from '../../common/hooks/useSocket';
 import { AppMode, useAppMode } from '../../common/stores/appModeStore';
 import { useEntryCopy } from '../../common/stores/entryCopyStore';
-import { cloneEvent } from '../../common/utils/eventsManager';
+import { cloneEvent } from '../../common/utils/clone';
 
 import BlockBlock from './block-block/BlockBlock';
 import BlockEnd from './block-block/BlockEnd';
@@ -329,7 +329,7 @@ export default function Rundown({ data }: RundownProps) {
   };
 
   if (sortableData.length < 1) {
-    return <RundownEmpty handleAddNew={(type: SupportedEntry) => insertAtId({ type }, cursor)} />;
+    return <RundownEmpty handleAddNew={(type: SupportedEntry) => addEntry({ type })} />;
   }
 
   // 1. gather presentation options

apps/client/src/features/rundown/RundownEntry.tsx

@@ -12,7 +12,7 @@ import {
 import { useEntryActions } from '../../common/hooks/useEntryAction';
 import useMemoisedFn from '../../common/hooks/useMemoisedFn';
 import { useEmitLog } from '../../common/stores/logger';
-import { cloneEvent } from '../../common/utils/eventsManager';
+import { cloneEvent } from '../../common/utils/clone';
 
 import DelayBlock from './delay-block/DelayBlock';
 import EventBlock from './event-block/EventBlock';

apps/client/src/features/rundown/block-block/BlockBlock.tsx

@@ -1,6 +1,14 @@
 import { useRef } from 'react';
-import { IoChevronDown, IoChevronUp, IoEllipsisHorizontal, IoReorderTwo } from 'react-icons/io5';
+import {
-import { IconButton, Menu, MenuButton, MenuItem, MenuList } from '@chakra-ui/react';
+  IoChevronDown,
+  IoChevronUp,
+  IoDuplicateOutline,
+  IoEllipsisHorizontal,
+  IoFolderOpenOutline,
+  IoReorderTwo,
+  IoTrash,
+} from 'react-icons/io5';
+import { IconButton, Menu, MenuButton, MenuItem, MenuList, Portal } from '@chakra-ui/react';
 import { useSortable } from '@dnd-kit/sortable';
 import { CSS } from '@dnd-kit/utilities';
 import { EntryId, OntimeBlock } from 'ontime-types';
@@ -23,7 +31,7 @@ interface BlockBlockProps {
 export default function BlockBlock(props: BlockBlockProps) {
   const { data, hasCursor, collapsed, onCollapse } = props;
   const handleRef = useRef<null | HTMLSpanElement>(null);
-  const { dissolveBlock } = useEntryActions();
+  const { clone, dissolveBlock, deleteEntry } = useEntryActions();
 
   const {
     attributes: dragAttributes,
@@ -52,6 +60,8 @@ export default function BlockBlock(props: BlockBlockProps) {
     cursor: isOver ? (isValidDrop ? 'grabbing' : 'no-drop') : 'default',
   };
 
+  const hasChildren = data.events.length > 0;
+
   return (
     <div
       className={cx([style.block, hasCursor && style.hasCursor, !collapsed && style.expanded])}
@@ -83,12 +93,24 @@ export default function BlockBlock(props: BlockBlockProps) {
               variant='ontime-ghosted'
               size='sm'
             />
-            <MenuList>
+            <Portal>
-              <MenuItem onClick={() => dissolveBlock(data.id)}>Dissolve Block</MenuItem>
+              <MenuList>
-            </MenuList>
+                <MenuItem icon={<IoDuplicateOutline />} onClick={() => clone(data.id)}>
+                  Clone Block
+                </MenuItem>
+                {hasChildren && (
+                  <MenuItem icon={<IoFolderOpenOutline />} onClick={() => dissolveBlock(data.id)}>
+                    Dissolve Block
+                  </MenuItem>
+                )}
+                <MenuItem icon={<IoTrash />} onClick={() => deleteEntry([data.id])}>
+                  Delete Block
+                </MenuItem>
+              </MenuList>
+            </Portal>
           </Menu>
           <IconButton
-            aria-label='Dissolve'
+            aria-label='Collapse'
             onClick={() => onCollapse(!collapsed, data.id)}
             color='#e2e2e2' // $gray-200
             variant='ontime-ghosted'

apps/client/src/views/cuesheet/cuesheet-table/cuesheet-table-menu/CuesheetTableMenuActions.tsx

@@ -3,7 +3,7 @@ import { MenuDivider, MenuItem, MenuList } from '@chakra-ui/react';
 import { isOntimeEvent, SupportedEntry } from 'ontime-types';
 
 import { useEntryActions } from '../../../../common/hooks/useEntryAction';
-import { cloneEvent } from '../../../../common/utils/eventsManager';
+import { cloneEvent } from '../../../../common/utils/clone';
 
 interface CuesheetTableMenuActionsProps {
   eventId: string;

apps/server/src/api-data/report/report.router.ts

@@ -1,10 +1,10 @@
 import express from 'express';
 import { getAll, deleteWithId, deleteAll } from './report.controller.js';
-import { paramsMustHaveEventId } from '../rundown/rundown.validation.js';
+import { paramsMustHaveEntryId } from '../rundown/rundown.validation.js';
 
 export const router = express.Router();
 
 router.get('/', getAll);
 
 router.delete('/all', deleteAll);
-router.delete('/:eventId', paramsMustHaveEventId, deleteWithId);
+router.delete('/:eventId', paramsMustHaveEntryId, deleteWithId);

apps/server/src/api-data/rundown/rundown.controller.ts

@@ -15,6 +15,7 @@ import {
   groupEntries,
   reorderEntry,
   swapEvents,
+  cloneEntry,
 } from '../../services/rundown-service/RundownService.js';
 import { getEntryWithId, getCurrentRundown } from '../../services/rundown-service/rundownUtils.js';
 
@@ -120,7 +121,7 @@ export async function rundownSwap(req: Request, res: Response<MessageResponse |
 
 export async function rundownApplyDelay(req: Request, res: Response<MessageResponse | ErrorResponse>) {
   try {
-    await applyDelay(req.params.eventId);
+    await applyDelay(req.params.entryId);
     res.status(200).send({ message: 'Delay applied' });
   } catch (error) {
     const message = getErrorMessage(error);
@@ -128,9 +129,19 @@ export async function rundownApplyDelay(req: Request, res: Response<MessageRespo
   }
 }
 
+export async function rundownCloneEntry(req: Request, res: Response<Rundown | ErrorResponse>) {
+  try {
+    const newRundown = await cloneEntry(req.params.entryId);
+    res.status(200).send(newRundown);
+  } catch (error) {
+    const message = getErrorMessage(error);
+    res.status(400).send({ message });
+  }
+}
+
 export async function rundownDissolveBlock(req: Request, res: Response<Rundown | ErrorResponse>) {
   try {
-    const newRundown = await dissolveBlock(req.params.eventId);
+    const newRundown = await dissolveBlock(req.params.entryId);
     res.status(200).send(newRundown);
   } catch (error) {
     const message = getErrorMessage(error);

apps/server/src/api-data/rundown/rundown.router.ts

@@ -5,6 +5,7 @@ import {
   rundownAddToBlock,
   rundownApplyDelay,
   rundownBatchPut,
+  rundownCloneEntry,
   rundownDelete,
   rundownDissolveBlock,
   rundownGetAll,
@@ -16,7 +17,7 @@ import {
   rundownSwap,
 } from './rundown.controller.js';
 import {
-  paramsMustHaveEventId,
+  paramsMustHaveEntryId,
   rundownArrayOfIds,
   rundownBatchPutValidator,
   rundownPostValidator,
@@ -29,7 +30,7 @@ export const router = express.Router();
 
 router.get('/', rundownGetAll);
 router.get('/current', rundownGetCurrent);
-router.get('/:eventId', paramsMustHaveEventId, rundownGetById); // not used in Ontime frontend
+router.get('/:eventId', paramsMustHaveEntryId, rundownGetById); // not used in Ontime frontend
 
 router.post('/', rundownPostValidator, rundownPost);
 
@@ -38,8 +39,9 @@ router.put('/batch', rundownBatchPutValidator, rundownBatchPut);
 
 router.patch('/reorder/', rundownReorderValidator, rundownReorder);
 router.patch('/swap', rundownSwapValidator, rundownSwap);
-router.patch('/applydelay/:eventId', paramsMustHaveEventId, rundownApplyDelay);
+router.patch('/applydelay/:entryId', paramsMustHaveEntryId, rundownApplyDelay);
-router.post('/dissolve/:eventId', paramsMustHaveEventId, rundownDissolveBlock);
+router.post('/clone/:entryId', paramsMustHaveEntryId, rundownCloneEntry);
+router.post('/dissolve/:entryId', paramsMustHaveEntryId, rundownDissolveBlock);
 router.post('/group', rundownArrayOfIds, rundownAddToBlock);
 
 router.delete('/', rundownArrayOfIds, deletesEventById);

apps/server/src/api-data/rundown/rundown.validation.ts

@@ -57,8 +57,8 @@ export const rundownSwapValidator = [
   },
 ];
 
-export const paramsMustHaveEventId = [
+export const paramsMustHaveEntryId = [
-  param('eventId').exists(),
+  param('entryId').exists(),
 
   (req: Request, res: Response, next: NextFunction) => {
     const errors = validationResult(req);

apps/server/src/services/rundown-service/RundownService.ts

@@ -21,7 +21,7 @@ import { updateRundownData } from '../../stores/runtimeState.js';
 import { runtimeService } from '../runtime-service/RuntimeService.js';
 
 import * as cache from './rundownCache.js';
-import { getInsertionPosition } from './rundownUtils.js';
+import { getPreviousId } from './rundownUtils.js';
 
 type CompleteEntry<T> =
   T extends Partial<OntimeEvent>
@@ -70,11 +70,12 @@ export async function addEvent(eventData: EventPostPayload): Promise<OntimeEntry
     throw new Error(`Event with ID ${eventData.id} already exists`);
   }
 
-  // 2. if the user provides a parent (inside a group), we make sure it exists
+  // 2. if the user provides a parent (inside a group), we make sure it exists and it is a group
   let parent: EntryId | null = null;
   if ('parent' in eventData && eventData.parent != null) {
-    if (!cache.hasId(eventData.parent)) {
+    const maybeParent = cache.getCurrentRundown().entries[eventData.parent];
-      throw new Error(`Parent event with ID ${eventData.parent} not found`);
+    if (!maybeParent || !isOntimeBlock(maybeParent)) {
+      throw new Error(`Invalid parent event with ID ${eventData.parent}`);
     }
     parent = eventData.parent;
   }
@@ -91,14 +92,14 @@ export async function addEvent(eventData: EventPostPayload): Promise<OntimeEntry
     }
   }
 
-  const { afterId, atIndex } = getInsertionPosition(parent, eventData?.after, eventData?.before);
+  const afterId = getPreviousId(eventData?.after, eventData?.before);
 
   // generate a fully formed entry from the patch
   const sanitisedEntry = generateEvent(eventData, afterId);
 
   // modify rundown
   const scopedMutation = cache.mutateCache(cache.add);
-  const { newEvent } = await scopedMutation({ atIndex, parent, entry: sanitisedEntry });
+  const { newEvent } = await scopedMutation({ afterId, parent, entry: sanitisedEntry });
 
   // notify runtime that rundown has changed
   updateRuntimeOnChange();
@@ -113,9 +114,9 @@ export async function addEvent(eventData: EventPostPayload): Promise<OntimeEntry
 /**
  * deletes event by its ID
  */
-export async function deleteEvent(eventIds: string[]) {
+export async function deleteEvent(eventIds: EntryId[]) {
   const scopedMutation = cache.mutateCache(cache.remove);
-  const { didMutate } = await scopedMutation({ eventIds });
+  const { didMutate, changeList } = await scopedMutation({ eventIds });
 
   if (!didMutate) {
     return;
@@ -125,7 +126,7 @@ export async function deleteEvent(eventIds: string[]) {
   updateRuntimeOnChange();
 
   // notify timer and external services of change
-  notifyChanges({ timer: eventIds, external: true });
+  notifyChanges({ timer: changeList, external: true });
 }
 
 /**
@@ -219,6 +220,27 @@ export async function applyDelay(delayId: EntryId) {
   notifyChanges({ timer: true, external: true });
 }
 
+/**
+ * Clones an entry, ensuring that all dependencies are preserved
+ */
+export async function cloneEntry(entryId: EntryId) {
+  const scopedMutation = cache.mutateCache(cache.clone);
+  const { newRundown, newEvent } = await scopedMutation({ entryId });
+
+  // notify runtime that rundown has changed
+  updateRuntimeOnChange();
+
+  if (isOntimeBlock(newEvent)) {
+    notifyChanges({ timer: newEvent.events, external: true });
+  } else if (isOntimeEvent(newEvent)) {
+    notifyChanges({ timer: [newEvent.id], external: true });
+  } else if (isOntimeDelay(newEvent)) {
+    notifyChanges({ external: true });
+  }
+
+  return newRundown;
+}
+
 /**
  * Deletes a block from the rundown and moves all its children to the top level
  */

apps/server/src/services/rundown-service/__tests__/rundownCache.test.ts

@@ -17,9 +17,10 @@ import {
   customFieldChangelog,
   dissolveBlock,
   groupEntries,
+  clone,
 } from '../rundownCache.js';
 import { makeOntimeBlock, makeOntimeDelay, makeOntimeEvent, makeRundown } from '../__mocks__/rundown.mocks.js';
-import { ProcessedRundownMetadata } from '../rundownCache.utils.js';
+import type { ProcessedRundownMetadata } from '../rundownCache.utils.js';
 
 beforeAll(() => {
   vi.mock('../../../classes/data-provider/DataProvider.js', () => {
@@ -625,13 +626,60 @@ describe('generate() v4', () => {
 });
 
 describe('add() mutation', () => {
-  test('adds an event to the rundown', () => {
+  test('adds an event an empty rundown', () => {
     const mockEvent = makeOntimeEvent({ id: 'mock', cue: 'mock' });
     const rundown = makeRundown({});
-    const { newRundown } = add({ atIndex: 0, entry: mockEvent, parent: null, rundown });
+    const { newRundown } = add({ afterId: undefined, entry: mockEvent, parent: null, rundown });
     expect(newRundown.order.length).toBe(1);
     expect(newRundown.entries['mock']).toMatchObject(mockEvent);
   });
+
+  test('adds an event at the top if no afterId is given', () => {
+    const mockEvent = makeOntimeEvent({ id: 'mock', cue: 'mock' });
+    const rundown = makeRundown({
+      flatOrder: ['1'],
+      order: ['1'],
+      entries: {
+        '1': makeOntimeEvent({ id: '1', cue: '1' }),
+      },
+    });
+    const { newRundown } = add({ afterId: undefined, entry: mockEvent, parent: null, rundown });
+    expect(newRundown.order).toStrictEqual(['mock', '1']);
+    expect(newRundown.flatOrder).toStrictEqual(['mock', '1']);
+    expect(newRundown.entries['mock']).toMatchObject(mockEvent);
+  });
+
+  test('adds an event at the top of the block if no after is given', () => {
+    const mockEvent = makeOntimeEvent({ id: 'mock', cue: 'mock' });
+    const rundown = makeRundown({
+      flatOrder: ['1', '1a'],
+      order: ['1'],
+      entries: {
+        '1': makeOntimeBlock({ id: '1' }),
+        '1a': makeOntimeEvent({ id: '1a', parent: '1' }),
+      },
+    });
+    const { newRundown } = add({ afterId: undefined, entry: mockEvent, parent: '1', rundown });
+    expect(newRundown.order).toStrictEqual(['1']);
+    expect(newRundown.flatOrder).toStrictEqual(['1', 'mock', '1a']);
+    expect(newRundown.entries['mock']).toMatchObject(mockEvent);
+  });
+
+  test('adds an event at the a given location inside a block', () => {
+    const mockEvent = makeOntimeEvent({ id: 'mock', cue: 'mock' });
+    const rundown = makeRundown({
+      flatOrder: ['1', '1a'],
+      order: ['1'],
+      entries: {
+        '1': makeOntimeBlock({ id: '1' }),
+        '1a': makeOntimeEvent({ id: '1a', parent: '1' }),
+      },
+    });
+    const { newRundown } = add({ afterId: '1a', entry: mockEvent, parent: '1', rundown });
+    expect(newRundown.order).toStrictEqual(['1']);
+    expect(newRundown.flatOrder).toStrictEqual(['1', '1a', 'mock']);
+    expect(newRundown.entries['mock']).toMatchObject(mockEvent);
+  });
 });
 
 describe('remove() mutation', () => {
@@ -767,6 +815,65 @@ describe('reorder() mutation', () => {
   });
 });
 
+describe('clone() mutation', () => {
+  it('clones an event and adds it to the rundown', () => {
+    const rundown = makeRundown({
+      order: ['1'],
+      flatOrder: ['1'],
+      entries: {
+        '1': makeOntimeEvent({ id: '1', cue: 'data1', parent: null }),
+      },
+    });
+
+    const { newRundown, newEvent } = clone({ rundown, entryId: '1' });
+
+    expect(newRundown.order).toStrictEqual(['1', newEvent!.id]);
+    expect(newRundown.flatOrder).toStrictEqual(['1', newEvent!.id]);
+  });
+
+  it('clones an event inside a block and adds it to the rundown', () => {
+    const rundown = makeRundown({
+      order: ['1'],
+      flatOrder: ['1', '1a'],
+      entries: {
+        '1': makeOntimeBlock({ id: '1', events: ['1a'] }),
+        '1a': makeOntimeEvent({ id: '1a', cue: 'nested', parent: '1' }),
+      },
+    });
+
+    const { newRundown, newEvent } = clone({ rundown, entryId: '1a' });
+
+    expect(newRundown.order).toStrictEqual(['1']);
+    expect(newRundown.flatOrder).toStrictEqual(['1', '1a', newEvent!.id]);
+    expect(newRundown.entries['1']).toMatchObject({ events: ['1a', newEvent!.id] });
+    expect(newRundown.entries[newEvent!.id]).toMatchObject({
+      type: SupportedEntry.Event,
+      parent: '1',
+      cue: 'nested',
+    });
+  });
+
+  it('clones a block and its nested elements', () => {
+    const rundown = makeRundown({
+      order: ['1'],
+      flatOrder: ['1', '1a'],
+      entries: {
+        '1': makeOntimeBlock({ id: '1', title: 'top', events: ['1a'] }),
+        '1a': makeOntimeEvent({ id: '1a', cue: 'nested', parent: '1' }),
+      },
+    });
+
+    const { newRundown, newEvent } = clone({ rundown, entryId: '1' });
+
+    expect(newRundown.order).toStrictEqual(['1', newEvent!.id]);
+    expect(newRundown.flatOrder).toStrictEqual(['1', '1a', expect.any(String), expect.any(String)]);
+    expect(newRundown.entries[newEvent!.id]).toMatchObject({
+      type: SupportedEntry.Block,
+      events: [expect.any(String)],
+    });
+  });
+});
+
 describe('dissolveBlock() mutation', () => {
   it('should correctly dissolve a block into its events', () => {
     const rundown = makeRundown({

apps/server/src/services/rundown-service/__tests__/rundownUtils.test.ts

@@ -0,0 +1,26 @@
+import { getPreviousId } from '../rundownUtils.js';
+
+// Mock cache module
+vi.mock('../rundownCache.js', () => ({
+  getEventOrder: () => ({
+    flatOrder: ['a', 'b', 'c', 'd'],
+  }),
+}));
+
+describe('getPreviousId', () => {
+  it('returns afterId if provided', () => {
+    expect(getPreviousId('b')).toBe('b');
+  });
+
+  it('returns the previous id before beforeId if provided', () => {
+    expect(getPreviousId(undefined, 'c')).toBe('b');
+  });
+
+  it('returns undefined if neither afterId nor beforeId is provided', () => {
+    expect(getPreviousId()).toBeUndefined();
+  });
+
+  it('returns undefined if beforeId is not found', () => {
+    expect(getPreviousId(undefined, 'z')).toBeUndefined();
+  });
+});

apps/server/src/services/rundown-service/rundownCache.ts

@@ -27,7 +27,14 @@ import { createBlock, createPatch } from '../../api-data/rundown/rundown.utils.j
 
 import type { RundownMetadata } from './rundown.types.js';
 import { apply } from './delayUtils.js';
-import { hasChanges, isDataStale, makeRundownMetadata, type ProcessedRundownMetadata } from './rundownCache.utils.js';
+import {
+  cloneBlock,
+  cloneEntry,
+  hasChanges,
+  isDataStale,
+  makeRundownMetadata,
+  type ProcessedRundownMetadata,
+} from './rundownCache.utils.js';
 
 let currentRundownId: EntryId = '';
 let currentRundown: Rundown = {
@@ -271,6 +278,7 @@ export function getMetadata(): Readonly<RundownMetadata & { revision: number }>
 
 export type RundownOrder = {
   order: EntryId[];
+  flatOrder: EntryId[];
   timedEventsOrder: EntryId[];
   playableEventsOrder: EntryId[];
 };
@@ -284,6 +292,7 @@ export function getEventOrder(): Readonly<RundownOrder> {
   }
   return {
     order: currentRundown.order,
+    flatOrder: currentRundown.flatOrder,
     timedEventsOrder: rundownMetadata.timedEventOrder,
     playableEventsOrder: rundownMetadata.playableEventOrder,
   };
@@ -333,41 +342,69 @@ export function mutateCache<T extends object>(mutation: MutatingFn<T>) {
   return scopedMutation;
 }
 
-type AddArgs = MutationParams<{ atIndex: number; parent: EntryId | null; entry: OntimeEntry }>;
+type AddArgs = MutationParams<{ afterId?: string; parent: EntryId | null; entry: OntimeEntry }>;
 /**
- * Add entry to rundown
+ * Add entry to rundown, handles the following cases:
+ * - 1. add entry in block, after a given entry
+ * - 2. add entry in block, at the beginning
+ * - 3. add entry to the rundown, after a given entry
+ * - 4. add entry to the rundown, at the beginning
  */
-export function add({ rundown, atIndex, parent, entry }: AddArgs): Required<MutatingReturn> {
+export function add({ rundown, afterId, parent, entry }: AddArgs): Required<MutatingReturn> {
-  const newEntry: OntimeEntry = { ...entry };
-
-  rundown.entries[newEntry.id] = newEntry;
-
   if (parent) {
     const parentBlock = rundown.entries[parent] as OntimeBlock;
-    parentBlock.events = insertAtIndex(atIndex, newEntry.id, parentBlock.events);
+    if (afterId) {
+      const atEventsIndex = parentBlock.events.indexOf(afterId) + 1;
+      const atFlatIndex = rundown.flatOrder.indexOf(afterId) + 1;
+      parentBlock.events = insertAtIndex(atEventsIndex, entry.id, parentBlock.events);
+      rundown.flatOrder = insertAtIndex(atFlatIndex, entry.id, rundown.flatOrder);
+    } else {
+      parentBlock.events = insertAtIndex(0, entry.id, parentBlock.events);
+      const atFlatIndex = rundown.flatOrder.indexOf(parent) + 1;
+      rundown.flatOrder = insertAtIndex(atFlatIndex, entry.id, rundown.flatOrder);
+    }
   } else {
-    rundown.order = insertAtIndex(atIndex, newEntry.id, rundown.order);
+    if (afterId) {
+      const atOrderIndex = rundown.order.indexOf(afterId) + 1;
+      const atFlatIndex = rundown.flatOrder.indexOf(afterId) + 1;
+      rundown.order = insertAtIndex(atOrderIndex, entry.id, rundown.order);
+      rundown.flatOrder = insertAtIndex(atFlatIndex, entry.id, rundown.flatOrder);
+    } else {
+      rundown.order = insertAtIndex(0, entry.id, rundown.order);
+      rundown.flatOrder = insertAtIndex(0, entry.id, rundown.flatOrder);
+    }
   }
 
+  // either way, we insert the entry into the rundown
+  rundown.entries[entry.id] = entry;
   setIsStale();
-  return { newRundown: rundown, changeList: [], newEvent: newEntry, didMutate: true };
+  return { newRundown: rundown, changeList: [], newEvent: entry, didMutate: true };
 }
 
 type RemoveArgs = MutationParams<{ eventIds: EntryId[] }>;
 /**
  * Remove entries in a rundown
- * It needs to ensure that the parent block is updated
+ * It handles element relationships specifically when dealing with nested items
+ * - when removing a nested item, remove the reference from the parent block
+ * - when removing a block, remove all nested items
  */
 export function remove({ rundown, eventIds }: RemoveArgs): MutatingReturn {
-  let didMutate = false;
+  /**
+   * changelist will hold a list of entries that need to be removed
+   * it will then be returned to the caller as a list of actually deleted entries
+   */
+  const changeList: EntryId[] = [];
 
   for (let i = 0; i < eventIds.length; i++) {
     const entry = rundown.entries[eventIds[i]];
-    if (isOntimeBlock(entry) || !entry.parent) {
+    // add the top level entry to the changeList
-      // top level events can simply be removed from the order
+    changeList.push(entry.id);
-      // the deletion process and the flatOrder are handled globally
+
-      rundown.order = rundown.order.filter((id) => id !== eventIds[i]);
+    if (isOntimeBlock(entry)) {
-    } else {
+      // for ontime blocks, we need to iterate through the children and delete them
+      changeList.concat([...entry.events]);
+    } else if (entry.parent) {
+      // at this point, we are handling entries inside a block, so we need to remove the references
       const parentBlock = rundown.entries[entry.parent] as OntimeBlock;
       const parentEvents = parentBlock.events.filter((id) => id !== eventIds[i]);
 
@@ -383,14 +420,19 @@ export function remove({ rundown, eventIds }: RemoveArgs): MutatingReturn {
         },
       });
     }
-
-    didMutate = true;
-    rundown.flatOrder = rundown.flatOrder.filter((id) => id !== eventIds[i]);
-    delete rundown.entries[eventIds[i]];
   }
 
+  // delete all entries in the changeList
+  for (let i = 0; i < changeList.length; i++) {
+    const entryId = changeList[i];
+    rundown.order = rundown.order.filter((id) => id !== entryId);
+    rundown.flatOrder = rundown.flatOrder.filter((id) => id !== entryId);
+    delete rundown.entries[entryId];
+  }
+
+  const didMutate = changeList.length > 0;
   if (didMutate) setIsStale();
-  return { newRundown: rundown, didMutate };
+  return { newRundown: rundown, didMutate, changeList };
 }
 
 /**
@@ -517,6 +559,55 @@ export function applyDelay({ rundown, delayId }: ApplyDelayArgs): MutatingReturn
   return { newRundown: rundown, didMutate: true };
 }
 
+type CloneEntryArgs = MutationParams<{ entryId: EntryId }>;
+/**
+ * Apply a delay
+ * Mutates the given rundown
+ */
+export function clone({ rundown, entryId }: CloneEntryArgs): MutatingReturn {
+  const entry = rundown.entries[entryId];
+  if (!entry) {
+    throw new Error('Entry not found');
+  }
+
+  if (isOntimeBlock(entry)) {
+    const newBlock = cloneBlock(entry, getUniqueId());
+    const nestedIds: EntryId[] = [];
+
+    for (let i = 0; i < entry.events.length; i++) {
+      const nestedEntryId = entry.events[i];
+      const nestedEntry = rundown.entries[nestedEntryId];
+      if (!nestedEntry) {
+        continue;
+      }
+
+      // clone the event and assign it to the new block
+      const newNestedEntry = cloneEntry(nestedEntry, getUniqueId());
+      (newNestedEntry as OntimeEvent | OntimeDelay).parent = newBlock.id;
+
+      nestedIds.push(newNestedEntry.id);
+      // we immediately insert the nested entries into the rundown
+      rundown.entries[newNestedEntry.id] = newNestedEntry;
+    }
+    // indexes + 1 since we are inserting after the cloned block
+    const atIndex = rundown.order.indexOf(entryId) + 1;
+    // we need to find the index of the last entry
+    const lastNestedIdInOriginal = entry.events.at(-1) ?? '0';
+    const flatIndex = rundown.flatOrder.indexOf(lastNestedIdInOriginal) + 1;
+
+    newBlock.events = nestedIds;
+    newBlock.title = `${entry.title} (copy)`;
+
+    rundown.entries[newBlock.id] = newBlock;
+    rundown.order = insertAtIndex(atIndex, newBlock.id, rundown.order);
+    rundown.flatOrder = mergeAtIndex(flatIndex, [newBlock.id, ...nestedIds], rundown.flatOrder);
+
+    return { newRundown: rundown, didMutate: true, newEvent: newBlock };
+  } else {
+    return add({ rundown, afterId: entryId, parent: entry.parent, entry: cloneEntry(entry, getUniqueId()) });
+  }
+}
+
 type DissolveBlockArgs = MutationParams<{ blockId: EntryId }>;
 /**
  * Deletes a block and moves all its children to the top level order

apps/server/src/services/rundown-service/rundownCache.utils.ts

@@ -10,6 +10,8 @@ import {
   isOntimeDelay,
   PlayableEvent,
   RundownEntries,
+  OntimeDelay,
+  OntimeBlock,
 } from 'ontime-types';
 import { dayInMs, getLinkedTimes, getTimeFrom, isNewLatest } from 'ontime-utils';
 
@@ -286,3 +288,37 @@ function processEntry<T extends OntimeEntry>(
 
   return { processedData, processedEntry: currentEntry };
 }
+
+export function cloneEvent(entry: OntimeEvent, newId: EntryId): OntimeEvent {
+  const newEntry = structuredClone(entry);
+  newEntry.id = newId;
+  newEntry.revision = 0;
+  return newEntry;
+}
+
+export function cloneDelay(entry: OntimeDelay, newId: EntryId): OntimeDelay {
+  const newEntry = structuredClone(entry);
+  newEntry.id = newId;
+  return newEntry;
+}
+
+export function cloneBlock(entry: OntimeBlock, newId: EntryId): OntimeBlock {
+  const newEntry = structuredClone(entry);
+  newEntry.id = newId;
+
+  // in blocks, we need to remove the events references
+  newEntry.events = [];
+  newEntry.revision = 0;
+  return newEntry;
+}
+
+export function cloneEntry<T extends OntimeEntry>(entry: T, newId: EntryId): T {
+  if (isOntimeEvent(entry)) {
+    return cloneEvent(entry, newId) as T;
+  } else if (isOntimeDelay(entry)) {
+    return cloneDelay(entry, newId) as T;
+  } else if (entry.type === 'block') {
+    return cloneBlock(entry as OntimeBlock, newId) as T;
+  }
+  throw new Error(`Unsupported entry type for cloning: ${entry}`);
+}

apps/server/src/services/rundown-service/rundownUtils.ts

@@ -6,7 +6,6 @@ import {
   EntryId,
   RundownEntries,
   ProjectRundowns,
-  OntimeBlock,
 } from 'ontime-types';
 
 import * as cache from './rundownCache.js';
@@ -175,37 +174,21 @@ export function getRundownOrThrow(rundowns: ProjectRundowns, rundownId: string):
   return rundowns[rundownId];
 }
 
-export function getInsertionPosition(
+/**
-  parentId: EntryId | null,
+ * Receives an insertion order and returns the reference to an event ID
-  afterId?: EntryId,
+ * after which we will insert the new event
-  beforeId?: EntryId,
+ */
-): { atIndex: number; afterId: EntryId | undefined } {
+export function getPreviousId(afterId?: EntryId, beforeId?: EntryId): EntryId | undefined {
   if (afterId) {
-    const order = selectOrderList(parentId);
+    return afterId;
-    return {
-      atIndex: order.findIndex((id) => id === afterId) + 1,
-      afterId,
-    };
   }
 
   if (beforeId) {
-    const order = selectOrderList(parentId);
+    const flatOrder = cache.getEventOrder().flatOrder;
-    const atIndex = order.findIndex((id) => id === beforeId);
+    const atIndex = flatOrder.findIndex((id) => id === beforeId);
-    return {
+    if (atIndex < 1) return undefined;
-      atIndex,
+    return flatOrder[atIndex - 1];
-      afterId: order[atIndex - 1] ?? null,
-    };
   }
 
-  return {
+  return;
-    atIndex: 0,
-    afterId: undefined,
-  };
-
-  function selectOrderList(parentId: EntryId | null) {
-    if (parentId) {
-      return (getEntryWithId(parentId) as OntimeBlock).events;
-    }
-    return cache.getEventOrder().order;
-  }
 }

apps/server/src/services/runtime-service/RuntimeService.ts

@@ -1,5 +1,6 @@
 import {
   EndAction,
+  EntryId,
   isOntimeEvent,
   isPlayableEvent,
   LogOrigin,
@@ -238,7 +239,7 @@ class RuntimeService {
    * Called when the underlying data has changed,
    * we check if the change affects the runtime
    */
-  public notifyOfChangedEvents(affectedIds?: string[]) {
+  public notifyOfChangedEvents(affectedIds?: EntryId[]) {
     const state = runtimeState.getState();
     const hasLoadedElements = state.eventNow !== null || state.eventNext !== null;
     if (!hasLoadedElements) {

packages/utils/src/common/arrayUtils.test.ts

@@ -1,4 +1,4 @@
-import { deleteAtIndex, insertAtIndex, reorderArray } from './arrayUtils.js';
+import { deleteAtIndex, insertAtIndex, mergeAtIndex, reorderArray } from './arrayUtils.js';
 
 describe('insertAtIndex', () => {
   it('should insert an item at the beginning of the array', () => {
@@ -23,7 +23,34 @@ describe('insertAtIndex', () => {
     const array = [1, 2, 3];
     const result = insertAtIndex(1, 5, array);
     expect(result).toEqual([1, 5, 2, 3]);
-    expect(array).toEqual([1, 2, 3]); // Original array should remain unchanged
+    expect(array).toEqual([1, 2, 3]);
+  });
+});
+
+describe('mergeAtIndex', () => {
+  it('should insert an item at the beginning of the array', () => {
+    const array = ['1', '2', '3'];
+    const result = mergeAtIndex(0, ['a', 'b'], array);
+    expect(result).toEqual(['a', 'b', '1', '2', '3']);
+  });
+
+  it('should insert an item at the end of the array', () => {
+    const array = ['1', '2', '3'];
+    const result = mergeAtIndex(3, ['a', 'b'], array);
+    expect(result).toEqual(['1', '2', '3', 'a', 'b']);
+  });
+
+  it('should insert an item in the middle of the array', () => {
+    const array = ['1', '2', '3'];
+    const result = mergeAtIndex(2, ['a', 'b'], array);
+    expect(result).toEqual(['1', '2', 'a', 'b', '3']);
+  });
+
+  it('should return a new array and not modify the original array', () => {
+    const array = ['1', '2', '3'];
+    const result = mergeAtIndex(5, ['a', 'b'], array);
+    expect(result).toEqual(['1', '2', '3', 'a', 'b']);
+    expect(array).toEqual(['1', '2', '3']);
   });
 });